Reaming tool



'May 14, 1935. c. E.sTURG|s V REAMING TOOL Original Filed Feb.

un Nnm 3mm i Clarks E argzs,

Patented May 14, 1935 I UNITED STATES PATENT OFFICE f REAMING TOOL Charles E. Sturgis, Rochester, N. Y.

Application February 21, 1933,' Serial Renewed October 15, 1934 1o claims. (o1. 15-1o4l1e)y Thisinvention relates to a reaming and polishing tool.

`One object of the invention is to provide a reaming tool for cleaning and polishing the in- 5 terior of valve stem guides or other tubular articles or devices-and which embodies aresilient, coiled wire strand, spirally Wrapped or wound upon a mandrel or stein and xed'thereto, and while possessing resilient characteristics, yet embodying sufficient stiffness to sufficiently act upon and remove carbon deposits from valve stem guides or foreign matter from the interior walls of gun barrels, pipes, or other tubular articles and serviceable as a lapping tool.

Another object of thev present invention resides in thev provision `of a reaming tool of the nature stated, embodyingamong other characteristics, a resilient element `peculiarly formed and peculiarly mounted on a mandrel or stem and possessing a multitude of vrounded burnishing points designed to effectively remove carbon deposits or other foreign substances from the interior of tubular articles or devices and accomplish the purpose in such a manner as not to scratch or score the interior walls of the articles.- Another object of the present invention is to provide a reaming tool for cleaning the interior of tubular elements including a coiled wire resilient strand spirally Wound upon a suitable operating stem or member in such a manner as to provide for slight variations in diameter for effectiveness in use of the tool in the event of a relatively tight fit thereof Within a tubular element and which, while possessing the requisite stiffness for such cleaning purposes, yet permitting such adjustment in variation of size as to diameter as to provide for tool.

A still further object of the inventionfis to providea reaming tool including acoiled wire resilient strand which' is spirally wound upon a suitable operating stem or member with the spirals arranged normally in Contact with Vone another, and yet, by virtue ofthe resiliency lof effective use of the the strand adjacent spirals may be separated' byv hand or otherwise to permit the insertion therebetween of a suitable tool so that in the event of any irregularities with respect to one or more spirals being found to be out of the plane of other spirals such spirals may be operated upon by rthe insertion of such a stated to operate upon the' irregular spirals in order to effect a y Ithroughout the length of the strand. l

It isstill further designed to provide a simple,

tool in the manner uniform diameter of the spirals inexpensive, durableiand effective reaming tool for yuse in valve 'connections and 'in which a resilient metallic element is so formed and mounted and arranged as to provide for a peculiar 'arrangement of burnishing portions operable Without danger of scratching or scoring the articles Worked upon.

With these and other objects in view, the invention consists in the construction and novel combination and arrangement of parts hereinafter fully described, illustrated in the accompanying drawings and pointed out in the claims hereto appended, it being understood'thatv various changes in the forni, proportion and minor details? of construction, Within the scope of the claims, maybe resorted to i from the spirit or sacrificing any of the advantages ofthe invention.'

In the drawing:-

' Figure 1 is an elevation of the invention partly in section, illustrating a valve stem guide in section and partly illustrating a hand operated tool embodying the present invention.

Fig. 2 is a similar view except that the operating stem is shown as operated through the instrumentality of motor driven means.

Fig. 34 is an elevation of the invention illustrating adjacent coils separated for the'purpose of operating upon coils outy of alignment with respect to diameter of "adjacent coils to give to all coils a substantially uniform diameter.

Fig. 4 is an enlarged transverse sectional view on the line 4 4 of Fig.v` 1. f

Fig. 5 is an enlarged transverse sectional view on the line 5-5 of Fig. 1.v

Fig. 6 is a View partly in elevation and partly in section of a modied form of the invention.

Fig. 7 is a similar view of another modification of the invention. l

Referring now more particularly to the accompanying drawing, the reference character, l indicates a cylindrical valve stem guide or other tubular member, shown in longitudinal section with the reaming tool A mounted there- 1n.

The `reaming tool A may be reciprocated longitudinally or itv may be oscillated transversely l5 without departing 1 member 3, and While the strand is rather tightly wound around the stem yet intermediate coils of the strand of the coiled wire may be separated by hand or tool movement longitudinally of the stem 3 for a purpose presently explained.

The stem 3 may be reduced at its inner end and screw threaded as at 4, for screw threaded Working fit in the screw threaded socket 5 of a hand operating handle 6; or, as shown in Fig. 2 the reduced screw threaded end 4 of the stem 3 may be secured in' a screw threaded socket 1 of a shaft 8 of an electric drill 9 or other motor, the connection in any event, regardless of how made, being such that the one reaming tool may have either the handle 6 or the motor 9 attached thereto for operating the same;

The stem 3, as shown, is provided with a transverse perforation I intermediate its ends and from a point adjacent this perforation the stern 3 is slotted longitudinally as at II,` to and through its outer end. This perforation I0 and the longitudinal slot II provide one form of means for securing the opposite ends o f the coiled wire strand 2 to the, stem.

For instance, one end of the coiled wire or resilient strand 2 may pass entirely through said perforation I0 and from this point the resilient coiled wire strandv extends in spiral wound form about theV stem over the slot II, withr the spirals close together and contacting with one another, to ay point immediately adjaCentthe outer end o fthe slot II when the outer extremityor terminal I3 of the coiled wire strand is directed transversely into said slot as` shown in Figs. I, 2 and 3 and the outer end of the stem then compressed, as shown in Figs. I, 2 and 3 to cause the sides of the slot II t0 pinch, bind or clamp the terminal I3 of the strand in the outer end of said slot as may be readily understood by reference to the accompanying drawing.

If desired, a screw I4 may have screw thread-` ed working fit in a screw threaded perforation I5 of the stern 3 andat` vits inner end bear against one side ofv tlie'slot` I I to maintain' the slot II uniform inl width throughout the length of the coiled strand and thereby insure a uniform diameter of coiled strand, the head of-the screw I4 being countersunlg in the stem 3, as`

shown. In otherwords, `I em loy the screw` I@ or other suitable means toA prevent collapse ofl the slot incident to lateral'force on the stem 3 during cleaningl operation.

The diameter of the coiled strand may be varied, depending upon the article tobe operated upon, but for certainuses',V such as the cleaning and polishing of valve stern guidesof Aenf gines, the diameter of the strand isK small, say for instance about three-sixteenths of an inch, more or less, and the coils oflth strand inlany event are formed close together and in fact contact and as the co strand and theV compactness` of spirals of the Wound coiled strand is that a great multitude of close togetherburnishing points are provided l with the burnishing points rounded iin all directions, due to thecoils and spirals, andso as to `obviate danger of scoringk or Scratchingsthe led strand lthus formed is wound rather tightly about the. stem 3 the'coilsY interior of the valve stem guide or other tubular member and giving a polish and smoothness to the interior of the tubular member by an effective removal of carbon deposits or other foreign matter.

Where scratched or scored follows that carbon will enter such scratches and scores and it has been found in practice that the deposit of carbon in scratches and scores is difficult of removal in a subsequent attempt to clean the guides, and therefore, the rounded or curved surfaces of the coils and spirals of the strand perform the cleaning function without this defect resulting from tools which scratch and score the interior walls of the guides.

Provision is made for a ready insertion of the assembled tool into or removal thereof from the valve stem guide or other tubular elements and this may be accomplished by a slight tapering of the ends of the coiled strand and this tapering may be effected in one manner by stretching slightly and almost imperceptibly the first wound spiral of the coiled strand at the transverse perforation I0 so as to bring the outer surface of such end spiral slightly within the plane or external diameterA of shown in Fig. l, the outermost spiral at the. outer end of the stem having its outer surface the interior of valve stem guides are brought slightly within the diameter of the the outer end of the stem is compressed to secure the outer end of the strand in the slot II asv shown in Fig. 1, this tapering at the end coils, if employed, being illustrated particularly in Fig. 1.

If one of the spiral windings between the end coils should be of an adjacent intermediate spiral such outer plane spiral or a plurality of them can be readily expanded or otherwise operated upon to bring them to the proper plane with respect to diameter of the remaining spirals, dueto the resiliency of the coiled spirals which enables independent` movement of the coiled' spirals longitudinally along the stem 2 so as toseparate certain spiralsV to permit the insertion of av tool of any suitable character adjacent coiled spirals and into and through the slot II to act upon the spirals to expand them into proper plane with relation to the other spirals, as may be gathered from the separation illustrated in Fig. 3. Aftery this operationA has,I been accomplished ther tool (not shown) may be withdrawn from between the spiralsand then by finger or hand manipulation, owing4 to the said resiliency of the strand, the coiledspiralsmay be brought into normal close together relation. The the strand possess sufcient resiliency to permit aslight variation in the normal diameter of the reamer to permit of a cleaning operation even adjacent spiral when in the event of an unusually tighty fit of thel tool or reamer in the tubular valve stem guide or other tubular member.

In Fig. 6 there is shown a modified form of i may be.

thev invention wherein the stem 3 formedof much shorter length than the stem 3 and preferably of one diameter but the wound strand 2 is preferably secured tov the stem 3 in the same manner in which the strand 2 isL secured to the` stem 3, the slot II in Fig. 6 being shown in dotted lines. The stem 3 is screw threaded, as at 4I, from itsl inner end toa point substantially close to the aperture` lli', The sleeve I6, whichis interiorly screw the adjacent spiral as.

found to be out of the planeV (not shown) between.

fact is that the coils of` by carbon cleaning tools it l threaded, has threaded working fit with the thread 4 of stem 3 sleeve `is slightly beveled, as indicated at II.

The inner end of the strand 2' is inserted in the- I8 in the outer end of vthe slot Il'the'sleeve inner endv of the I6 is worked further inwardly on the thread Il.

of the stem and thereby insuring tight-compact relationv of the coils of the strand 2C, there being suiiicient exposure of the thread 5' beyond the sleeve I6 to take the screw thread socket of a handle such as 6,"shown in Fig.

1, or a threaded socket of a shaftv 8 of a motorl 9, as shown in Fig. 2.r

Another modification of the invention is shown in Fig. 7, Kwherein the sleeve I6 works on the threaded end 4a of the stem 3a to force a collar I 9 tightly against the inner end of the coil of the strand 2a, the inner end of the collar I9 being beveled or tapered as shown, for the same purpose as the tapered or beveled end I7 of the sleeve I6 shown in Fig. 6. The stem 3a has a slot I Ia the same as the slots II and II of the forms previously described. However, the stem 3a has its outer end screw threaded as indicated at 2| and instead of pinching the slotted outer end of the stem 3a onto the inwardly directed outer end 22 of the strand 2a located in the outer end of said slot Ila, I provide an interiorly screw threaded collar 23, which has a tapered inner end 24 adapted to engage the outer end of the strand 2a whereby the latter may have its coils maintained in close compact condition between the collars I9 and 23 and the strand 29, consequently held iirmly against accidental disconnection from the stem 3a.

In Figs. 6 and '7 it is obvious that, if desired, there may be employed a screw like screw I4 shown in Fig. 2 to prevent collapsing of the slot in the stem, and for the same purpose as that described in connection with screw I4 illustrated in Fig. 2, and which seems unnecessary to illustrate in View of the showing made in Fig. 2 and the fact that this screw may be eliminated if desired. l

It will be understood from the foregoing that I provide a simple, inexpensive, durable andv effective tool for reaming out the interior of valve stem guides without danger of scratching or scoring of the guide and that I accomplish this result mainly through the use of a spiral strand spirally wrapped about a stern or other operating member and fixed thereon and which strand by virtue of its resiliency possesses characteristics permitting adjustment of the diameter of the reamer under tight Working conditions as well as an adjustment of separate coils in the length of the coiled Wire strand.

It will also be apparent that the present reamer is equally as effective for use in reaming out the interior of valve guides or other tubular devices, including for instance, gun barrels, pipes, and other tubular devices unnecessary to mention herein, and may be used as a lapping tool.

What is claimed is:

1. A tool of the character described comprisand at its inner end thev until its inner bev- The strand 2r is then coiled orl ing a stem having a transverse perforation there-v in and also having a relatively long longitudinal slot spaced from and leading from adjacent said perforation toY and through one end *of the stern, and al metallic strandl spirally wound around the stern and over said longitudinal slot and having.

one end secured in said perforation and having lits opposite endsecured in said slot adjacent the" outer end ofthe latter. v

2. Atool of the character described vcomprising a stem having a transverse perforation-therein and also having a longitudinal slot spaced from and leading from adjacent said .perfora-l tion to and through one end of the stem, and a coiled Wire strand spirally Wound around the stem and over said longitudinal slot and having one end secured in said perforation and having' its opposite end secured in said slot.

3. A tool ofthe character describedcomprising a stem having a transverse perforation therein and also having a longitudinal slot spaced fromand leading from adjacent said perforation to and through one end of the` stem, and a coiled wire strand spirally Wound around the stem over said longitudinal slot and having one end secured in said perforation and having its opposite end secured in said slot, the intermediate spirals being independently shiftable along the stem.

ll. A tool of the character described comprising a stem having a transverse perforation therein and also having a longitudinal slot spaced from and leading from adjacent said perforation to and through one end of the stein, and a coiled wire strand spirally wound around the stem over said longitudinal slot and having one end secured in said perforation and having its opposite end secured in said slot, the spirals being arranged close together in contacting relation and the intermediate spirals being independently separable and shiftable along the stem to permit passage of an instrument transversely through said slot to expand a spiral of the coiled wire strand so as to maintain regularity with respect to the diameter of the spirals.

5. A tool of the character described comprising a stem having a transverse perforation therein and also having a relatively long longitudinally disposed slot, and a wirer strand wound around the stem over said longitudinal slot and having one of its ends secured in said perforation and having its other end secured in said slot.

6. A cleaning tool of the class described comprising a stem provided with a longitudinal slot extending inwardly from the outer end of the stem to provide terminal clamping portions and a tool receiving portion, and a coiled strand spirally Wound around the stem over the longitudinal slot thereof and secured at its inner end to the stem beyond the slot and having its outer end held between the terminal clamping portions of the stem, the slot of the stem permitting an instrument to be passed through the stem when the spirals of the strand about the stem are separated at one 'side of the stem for shaping the strand. l

7. A tool of the character described comprising a stem having a transverse perforation therein and also having a longitudinal slot therein which opens through one end thereof, a coiled strand spirally wound around the stem over said slot and having one end secured in said perforation and its other end secured in said slot, and

perforation and its other end pinchedy in said'Y slot adjacent the outer end of the slot, and means in said slot intermediate the ends thereof to prevent contraction of the slot between. the.

i l screwy threaded collar ends of said strand.

9.. A tooll of the character described comprising a stem,.a closely coiled strand spirally wound around the stem and having its ends extendedv transversely into said stem, and av sleeve having screw threaded Working fit on thek stem and having an inwardly beveled end to fit over and bear against one end of the strand to maintain the spirals close together and to prevent disconnec,`

tion ofr suchend of the strand from the stem.

menigeen 10. A'tool of the'v character described comprs=i a stem= having. a relatively long slot therein, aclosely coiledY strand the: stem over said slot and having its ends extendedf transversely into said stem, said stem being screw threaded at each end,` a collar interiorly screvvY threaded and having Working' flt onthec screw threaded inner end of the stem to bear.V against the inner end of said strand, an interiorly screw threaded'sleevehaving Workingv flt on the. screw threaded inner end of the stem tov bear against said collar, and an interiorly fit on the screw threaded outer end of the stem' and' having a ,beveled inner end to bearvagainst the outer encl` of said stem and: maintaining close togethen n CHARLES E. STURGIS.

spirally Wound ,around having threaded Workingr strand, said. collars [andsleeve preventingdisconnection vof the transfkv versely directed ends of the strandV from the theaspirals of the strand. 

